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Python中模拟enum枚举类型的5种方法分享

2024-04-06 14:24:04 498

以下几种方法来模拟enum：（感觉方法一简单实用）


#way1

classDirections:

   up=0

   down=1

   left=2

   right=3

   

printDirections.down

#way2 dirUp,dirDown,dirLeft,dirRight=range(4)

printdirDown

#way3 importcollections dircoll=collections.namedtuple('directions',('UP','DOWN','LEFT','RIGHT')) directions=dircoll(0,1,2,3)

printdirections.DOWN

#way4 defenum(args,start=0): classEnum(object): __slots__=args.split()

def__init__(self): fori,keyinenumerate(Enum.__slots__,start): setattr(self,key,i)

returnEnum()

e_dir=enum('updownleftright')

printe_dir.down

#way5 #sometimesweneeduseenumvalueasstring Directions={'up':'up','down':'down','left':'left','right':'right'}

printDirections['down']